In-hole back-dragging assembly method for rear matched trolley of super-large-diameter shield tunnel

Abstract

The invention provides an in-hole back-dragging assembly method for a rear matched trolley of a super-large-diameter shield tunnel. The in-hole back-dragging assembly method can solve the problems that in the prior art, in the back-dragging assembly process, materials are wasted, the occupied construction space is large, and the construction efficiency is low. Through the modular design and the reusable movable track panel track, the laying of rails and the use of other consumable materials are greatly reduced, meanwhile, the utilization of the construction space is optimized, the splicing efficiency of the shield tunneling machine is remarkably improved, and the movable track panel track comprises a back-dragging translation trolley and the movable track panel track; the back-dragging translation trolley comprises a square trolley body, two rows of walking steel wheels are arranged on the left side and the right side of the bottom of the trolley body, and square steel guide rails are arranged on the left side and the right side of the top of the trolley body. The movable track panel track is formed by splicing a plurality of movable track panel units, and auxiliary guide rails matched with the walking steel wheels are arranged on the left sides and the right sides of the tops of the movable track panel units.

Description

Technical Field

[0001] The invention relates to the technical field of shield construction, and in particular to a method for assembling a rear supporting trolley in an ultra-large diameter shield tunnel. Background Art

[0002] As an efficient and safe tunnel construction method, the shield method has been widely used in various underground engineering projects. In the construction process of large-diameter shield tunnels, in order to promote the smooth excavation of the shield machine, the assembly equipment needs to be assembled and adjusted in the tunnel. The general steps are to set up the starting base in the starting shaft, and there is a mine tunnel expansion section between the starting shaft and the standard section of the mine tunnel. The mine tunnel expansion section is generally about 3.8m lower than the standard section of the mine tunnel. Then, the rear supporting trolley is transported from the starting shaft through the mine tunnel expansion section to the standard section of the mine tunnel, so as to assemble the shield machine.

[0003] However, due to the narrow tunnel space, the dragging and assembly of shield assembly equipment face strict restrictions on height and width, making it difficult to adapt to the equipment entry requirements. In traditional construction methods, shield assembly equipment mostly relies on manual or heavy machinery dragging, and the equipment is gradually transferred to the standard section of the tunnel through the auxiliary steel platform set up in the starting shaft to gradually complete the assembly. This method is not only cumbersome and complicated, but also prone to jamming in narrow spaces, resulting in inconvenience in dragging. In order to improve construction efficiency, some schemes have installed special tracks at the bottom of the expanded section of the mine tunnel to assist the movement of shield assembly equipment. However, most of these tracks are disposable and are built into disposable tracks using steel frames and other structures. The laying and dismantling of the tracks consumes a lot of construction materials, especially the laying and connection of concrete box culverts and rails, which increases a lot of resource costs. In addition, the height of many auxiliary platforms and drag track systems is relatively large, which is difficult to adapt to the space limitations of mine tunnels, resulting in height restrictions during the movement of equipment, affecting the flexibility and passability of shield equipment in the tunnel. Therefore, in the assembly and commissioning project of large-diameter shield machines, how to efficiently and material-savingly complete the assembly and backhauling of shield equipment remains a technical problem that needs to be solved urgently. Summary of the invention

[0004] The present invention provides a method for assembling a rear-mounted trolley in an ultra-large diameter shield tunnel, which can solve the problems of material waste, large construction space occupation and low construction efficiency in the prior art. Through modular design and reusable mobile rail tracks, the present invention greatly reduces the laying of rails and the use of other consumable materials, while optimizing the use of construction space and significantly improving the efficiency of shield machine assembly.

[0005] The present invention is achieved through the following technical solutions: A method for assembling a rear supporting trolley in a shield tunnel with a super large diameter, comprising a trolley for traction and translation and a movable track; The back-pulling translation trolley comprises a square body, two rows of walking steel wheels are arranged on the left and right sides of the bottom of the body, and square steel guide rails are arranged on the left and right sides of the top of the body; The movable rail track is assembled from a plurality of movable rail units, and auxiliary guide rails cooperating with the traveling steel wheels are arranged on the left and right sides of the top of the plurality of movable rail units; It includes the following steps: S10. Lay the starting base in the starting shaft of the shield tunnel, and assemble multiple mobile rail units in front and back to lay the mobile rail track in the mine tunnel expansion section. The top left and right sides of the mobile rail are equipped with guide rails; align the front end of the mobile rail track with the height of the starting base; S20, hoisting the back-towing translation trolley onto the starting base in the starting well by means of a hoist; S30, install No. 1 winch at the starting shaft, install No. 2 winch at the front end of the standard section of the mine tunnel, and install No. 3 winch at the rear end. The wire rope of No. 1 winch is connected to the front end of the back-towing translation trolley, and the wire rope of No. 2 winch is connected to the rear end of the back-towing translation trolley; No. 3 winch is used for relay back-towing; S40. Place the supporting trolley after hoisting the shield machine down into the well on the back-pulling translation trolley, so that the running wheels of the supporting trolley after the shield machine cooperate with the square steel guide rails of the back-pulling translation trolley; Through the traction of the No. 2 winch, the back-hauling translation trolley carrying the shield rear supporting trolley moves from the mobile rail track to the standard section of the mine tunnel. At this time, the square steel guide rails of the back-hauling translation trolley are aligned with the tracks of the standard section of the mine tunnel, and the shield rear supporting trolley is moved from the square steel guide rails of the back-hauling translation trolley to the tracks of the standard section of the mine tunnel; S50: Assemble the shield machine.

[0006] Furthermore, the body of the back-towing translation trolley includes a left frame and a right frame, and the left frame and the right frame are detachably connected by a transverse connecting steel frame and bolts.

[0007] Furthermore, the traveling steel wheel comprises a welded steel plate fixedly connected to the vehicle body and an anti-skid steel plate connected to the lower end of the welded steel plate via an intermediate shaft, and the anti-skid steel plate is equipped with two rollers via two wheel axles.

[0008] Furthermore, an annular groove cooperating with the auxiliary guide rail is provided on the outer circumference of the roller.

[0009] Furthermore, the movable rail unit comprises an arc-shaped bottom plate, the inner side surface of the arc-shaped bottom plate is welded with a grid-shaped reinforcing rib plate, and adjacent movable rail units are spliced ​​front and back by screws.

[0010] Furthermore, the body of the return-drag translation trolley is formed by welding steel beams.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. The method for assembling the rear supporting trolley in the tunnel of the ultra-large diameter shield tunnel described in the present invention uses a trolley for pulling back and a movable rail track, which greatly optimizes the construction process. The height of the trolley for pulling back and moving is only 1 cm higher than the tunnel culvert, which effectively saves construction space, and its movable rail track can be reused, which greatly reduces the workload of splicing concrete culverts and laying rails, thereby significantly reducing material consumption and construction costs. This invention improves construction efficiency and reduces resource waste through modular design and maximum utilization of materials, providing a more efficient, environmentally friendly and economical solution for shield construction; 2. In the present invention, the running wheels of the rear supporting trolley of the shield machine cooperate with the square steel guide rails of the return-drag translation trolley, and the running wheels of the return-drag translation trolley cooperate with the auxiliary guide rails of the mobile track, ensuring the smooth traction and precise transition of the trolley during shield construction, so that the rear supporting trolley can smoothly transition between different track systems, ensuring the continuity and stability of construction. Through the winch system, the rear supporting trolley can accurately control the movement of the equipment to achieve safe and smooth movement of the equipment in the tunnel. This invention not only greatly improves construction efficiency, reduces the time waste and risks that may occur in traditional construction methods, but also ultimately achieves the goal of reducing costs, improving construction efficiency and equipment safety; 3. The mobile track is composed of reusable mobile track units, which can effectively reduce the demand for steel rails and concrete foundations, and significantly reduce the consumption of materials during the construction process. The reusable nature of the mobile track allows the track and trolley structure to be reused repeatedly in multiple construction stages, thereby maximizing the utilization of materials and reducing waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a three-dimensional schematic diagram of the back-dragging translation trolley described in this embodiment; Figure 2 This is a side view of the back-dragging translation trolley described in this embodiment; Figure 3 This is a schematic diagram of the back-dragging translation trolley and the moving rail track described in this embodiment; Figure 4 is a schematic diagram of the mobile track unit described in this embodiment; Figure 5 This is a schematic diagram of the back-hauling translation trolley carrying the shield machine supporting trolley in this embodiment; Figure 6This is a schematic diagram of the assembly process of the rear supporting trolley for the ultra-large diameter shield tunnel in this embodiment; Figure 7 This is a flow chart of the method for pulling back and assembling the rear supporting trolley in the tunnel of the ultra-large diameter shield tunnel described in this embodiment; In the figure: 1. Back-drag translation trolley, 2. Horizontal connecting steel, 3. Mobile rail track, 4. Mobile rail unit, 5. Traveling steel wheel, 51. Welded steel plate, 52. Anti-slip steel plate, 53. Roller, 6. Square steel guide rail, 7. Auxiliary guide rail, 8. No. 1 winch, 9. No. 2 winch, 10. Shield rear supporting trolley. DETAILED DESCRIPTION

[0013] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0014] Those skilled in the art will appreciate that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or coupling. The term "and / or" used herein includes any unit and all combinations of one or more items listed in association.

[0015] There is an expanded section of the mine tunnel between the starting shaft and the standard section of the mine tunnel. The expanded section of the mine tunnel is generally about 3.8m lower than the standard section of the mine tunnel. In order to be able to transport the rear-end trolley from the starting shaft through the expanded section of the mine tunnel to the standard section of the mine tunnel for shield machine assembly, this embodiment adopts a traction control system, a back-hauling translation trolley 1 and a mobile rail track 3 to carry out the back-hauling assembly of the rear-end trolley of the super-large diameter shield tunnel in the hole.

[0016] The back-towing translation trolley 1 includes a square body, and the body of the back-towing translation trolley 1 includes a left frame and a right frame, and the left frame and the right frame are detachably connected by a transverse connecting steel frame 2 and bolts. Two rows of walking steel wheels 5 are installed on the left and right sides of the bottom of the body, and square steel guide rails 6 are installed on the left and right sides of the top of the body. By changing the length of the transverse connecting steel frame 2, the back-towing translation trolley 1 can have a variety of track gauge options.

[0017] The walking steel wheel 5 includes a welded steel plate 51 fixedly connected to the vehicle body and an anti-skid steel plate 52 connected to the lower end of the welded steel plate 51 through an intermediate shaft. The anti-skid steel plate 52 is equipped with two rollers 53 through two wheel axles. The rollers 53 are made of high-strength wear-resistant materials, which can effectively disperse the load and reduce the friction between the track, thereby ensuring the smooth travel of the back-towing translation trolley 1, reducing vibration, and improving safety and equipment stability during construction.

[0018] The mobile rail track 3 is assembled from a plurality of mobile rail units 4, each of which includes an arc bottom plate, the inner side of which is welded with a grid-shaped reinforcing rib plate, and adjacent mobile rail units 4 are spliced ​​front and back by screws, and auxiliary guide rails 7 cooperating with the traveling steel wheels 5 are arranged on the left and right sides of the tops of the plurality of mobile rail units 4. In order to fully cooperate with the auxiliary guide rails 7, an annular groove cooperating with the auxiliary guide rails 7 is processed on the outer circumference of the roller 53. The mobile rail unit 4 can be disassembled and reused repeatedly, which can effectively reduce the demand for steel rails and concrete foundations, significantly reduce the consumption of materials during construction, thereby maximizing the utilization rate of materials and reducing waste.

[0019] The traction control system mainly includes the No. 1 winch 8, the No. 2 winch 9 and the No. 3 winch 10, which are key components for driving and controlling the movement of the back-towing translation trolley 1. The system realizes the smooth forward and backward movement of the back-towing translation trolley 1 through the precise pulling and releasing actions of the winch. As the core power device of the traction control system, the winch has strong traction and can pull the back-towing translation trolley 1 under different slopes and load conditions.

[0020] The method for assembling the rear supporting trolley in the ultra-large diameter shield tunnel described in this embodiment specifically includes the following steps: S10, laying the starting base in the starting shaft of the shield machine, assembling and laying a plurality of mobile rail units 4 to form a mobile rail track 3 in the expanded section of the mine tunnel, installing auxiliary guide rails 7 on the left and right sides of the top of the mobile rail track 3; aligning the front end of the mobile rail track 3 with the height of the starting base, S20, using a sling to lower the back-towing translation trolley 1 into the well and place it on the starting base in the starting well; S30, install a No. 1 winch 8 at the starting shaft, install a No. 2 winch 9 at a suitable position in the standard section of the mine tunnel, connect the wire rope of the No. 1 winch 8 to the front end of the back-towing translation trolley 1, and connect the wire rope of the No. 2 winch 9 to the rear end of the back-towing translation trolley 1; S40, hoisting the shield machine behind the supporting trolley 10 and the back-pulling translation trolley 1 to splice each other, so that the running wheels of the shield machine behind the supporting trolley cooperate with the square steel guide rails 6 of the back-pulling translation trolley 1; Through the traction of the No. 2 winch 9, the back-hauling translation trolley 1 is smoothly moved from the starting base to the mobile rail track 3, so that the back-hauling translation trolley 1 carrying the shield rear supporting trolley 10 moves from the mobile rail track 3 to the position of the standard section of the mine tunnel. At this time, the square steel guide rail 6 of the back-hauling translation trolley 1 is aligned with the track of the standard section of the mine tunnel, and then the shield rear supporting trolley is moved from the square steel guide rail 6 of the back-hauling translation trolley 1 to the track of the standard section of the mine tunnel; The first winch 8 is used to pull the return translation trolley 1 back to the starting base position; S50. Shield machine assembly construction is carried out on the standard section of the mine tunnel.

[0021] Existing shield construction technology usually requires a large amount of splicing of concrete box culverts and laying of rails. The construction process is cumbersome and the material consumption is large, especially in the design of the assembly platform and the back-pulling equipment, which often takes up a lot of space and resources. In addition, the tracks and assembly equipment used in the prior art are often disposable, resulting in high construction costs and environmental burdens. The present invention greatly optimizes the construction process through the innovative design of the back-pulling translation trolley 1 and the modular and combined design of the mobile rail track 3. The mobile rail track 3 is reusable, which greatly reduces the workload of splicing concrete box culverts and laying rails, thereby significantly reducing material consumption and construction costs. The invention improves construction efficiency and reduces resource waste through modular design and maximum utilization of materials, providing a more efficient, environmentally friendly and economical solution for shield construction.

Claims

1. A method for assembling a rear supporting trolley in an ultra-large diameter shield tunnel, characterized in that: Including the back-hauling translation trolley and the moving rail track; The back-pulling translation trolley comprises a square body, two rows of walking steel wheels are arranged on the left and right sides of the bottom of the body, and square steel guide rails are arranged on the left and right sides of the top of the body; The movable rail track is assembled from a plurality of movable rail units, and auxiliary guide rails cooperating with the traveling steel wheels are arranged on the left and right sides of the top of the plurality of movable rail units; It includes the following steps: S10. Lay a starting base in the starting shaft of the shield machine, assemble multiple moving rail units front and back to form a moving rail track in the mine tunnel expansion section, and install auxiliary guide rails on the left and right sides of the top of the moving rail track; align the front end of the moving rail track with the height of the starting base; S20, using a sling to lower the translation trolley back into the well and place it on the starting base in the starting well; S30, install No. 1 winch at the front end of the starting shaft, install No. 2 winch at the front end of the standard section of the mine tunnel, and install No. 3 winch at the rear end. The wire rope of No. 1 winch is connected to the front end of the back-towing translation trolley, and the wire rope of No. 2 winch is connected to the rear end of the back-towing translation trolley; No. 3 winch is used for relay back-towing; S40, hoist the shield behind the shaft and connect the trolley with the return-drag translation trolley, so that the running wheels of the trolley behind the shield cooperate with the square steel guide rails of the return-drag translation trolley; and fix them on the return-drag translation trolley; The No. 2 winch is used to pull the back-hauled translation trolley carrying the shield rear-end trolley from the mobile rail track to the standard section of the mine tunnel. At this time, the square steel guide rails of the back-hauled translation trolley are aligned with the tracks of the standard section of the mine tunnel. The fixing device is released to move the shield rear-end trolley from the square steel guide rails of the back-hauled translation trolley to the tracks of the standard section of the mine tunnel. The rear-end trolley is then towed back to the installation position by the No. 3 winch. S50: Assemble the shield machine.

2. The method for assembling the rear supporting trolley in the tunnel of an ultra-large diameter shield tunnel according to claim 1 is characterized in that: The body of the back-towing translational trolley comprises a left frame and a right frame, and the left frame and the right frame are detachably connected via a transverse connecting steel frame and matching bolts.

3. The method for assembling the rear supporting trolley in the tunnel of an ultra-large diameter shield tunnel according to claim 2 is characterized in that: The traveling steel wheel comprises a welding steel plate fixedly connected to the vehicle body and an anti-skid steel plate connected to the lower end of the welding steel plate through an intermediate shaft, and the anti-skid steel plate is equipped with two rollers through two wheel axles.

4. The method for assembling the rear supporting trolley in the tunnel of an ultra-large diameter shield tunnel according to claim 3 is characterized in that: An annular groove matching with the auxiliary guide rail is arranged on the outer circumference of the roller.

5. The method for assembling the rear supporting trolley in the tunnel of an ultra-large diameter shield tunnel according to claim 1 is characterized in that: The movable rail unit comprises an arc-shaped bottom plate, the inner side surface of which is welded with a grid-shaped reinforcing rib plate, and adjacent movable rail units are spliced ​​front and back by screws.

6. The method for assembling the rear supporting trolley in the tunnel of an ultra-large diameter shield tunnel according to any one of claims 1 to 5, characterized in that: The body of the back-dragging translation trolley is formed by welding steel beams.

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